20129833 has 2 divisors, whose sum is σ = 20129834. Its totient is φ = 20129832.

The previous prime is 20129789. The next prime is 20129861. The reversal of 20129833 is 33892102.

It is an a-pointer prime, because the next prime (20129861) can be obtained adding 20129833 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17413929 + 2715904 = 4173^2 + 1648^2 .

It is a cyclic number.

It is not a de Polignac number, because 20129833 - 2²¹ = 18032681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20129533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064916 + 10064917.

It is an arithmetic number, because the mean of its divisors is an integer number (10064917).

Almost surely, 2^20129833 is an apocalyptic number.

It is an amenable number.

20129833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129833 is an equidigital number, since it uses as much as digits as its factorization.

20129833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20129833 is about 4486.6282440158. The cubic root of 20129833 is about 272.0278635311.

The spelling of 20129833 in words is "twenty million, one hundred twenty-nine thousand, eight hundred thirty-three".